Miami Heat guard Dwyane Wade with wife Gabrielle Union-Wade and their new baby daughter born via surrogate on Wednesday night, as Wade announced on social media on Thursday. (Via Dwyane Wade's Instagram)

Those “personal reasons” for Dwyane Wade missing the Miami Heat’s game against the San Antonio Spurs on Wednesday became clearer Thursday.

The star Heat guard and wife Gabrielle Union welcomed a new baby daughter to the family via surrogate on Wednesday night, Wade announced on Instagram and Twitter.

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“We are sleepless and delirious but so excited to share that, our miracle baby, arrived last night via surrogate and 11/7 will forever be etched in our hearts as the most loveliest of all the lovely days,” Wade tweeted, with three photos of he and his actress wife with the newborn. “Welcome to the party sweet girl! #onelastdance.”

We are sleepless and delirious but so excited to share that, our miracle baby, arrived last night via surrogate and 11/7 will forever be etched in our hearts as the most loveliest of all the lovely days. Welcome to the party sweet girl! #onelastdance@itsgabrielleu ❤️ ♥️ ♥️ pic.twitter.com/JudAeQlbJ7

The baby daughter is Wade’s fourth child and first with Union. His three sons are Zaire, Xavier and Zion, and Zaire Wade is currently a junior at American Heritage High in Plantation and a college basketball recruit that has received a scholarship offer from Nebraska, Union’s alma mater.

Wade, 36, married Union, 46, in August 2014. In a memoir “We're Going To Need More Wine: Stories That Are Funny, Complicated, and True,” released last year Union wrote tabout her struggles to have a baby with Wade.

"I have had eight or ninemiscarriages. I never wanted children before Dwyane, '' she wrote in the book.

The Heat next host the Pacers on Friday night, but it’s unknown whether Wade will play.

With Wade out, center Hassan Whiteside scored 29 points with 20 rebounds and nine blocks in a 95-88 Heat win over the Spurs on Wednesday night.